The locations of bibtex2html and bibtex have not been configured.
           Please add the following lines in wiki configuration: 
            
           bibtex_bibtex = '/path/to/bibtex'
           bibtex_bibtex2html = '/path/to/bibtex2html'
           
           Sometime it is also necessary to specify where the BibTeX style files (.bst) 
           are located. Then it is necessary to add a line in wiki configuration:  
                                   
           bstfiles = '/path/to/bstfiles'
             
           (Also see HelpOnConfiguration).